JPH08100952A - Storage type hot water supply system - Google Patents

Abstract

PURPOSE: To prevent a user from suffering scald or the like and enable the continuation of a heating operation and followup boiling of a bath in case of control abnormality that sends hot water actually supplied up to a considerably high temperature than a set water heating temperature because of poor mounting of a mixing adjustor or the like. CONSTITUTION: This storage type hot water supply system has a hot water storage boiler body 10 which is provided with a burner 12 and a hot water storage tank 14 while heat exchange coils 15 and 16 for heating and follow-up boiling of a bath are arranged in the hot water storage tank 14, a water feed pipe 20, a hot water delivery pipe 40, a bypass pipe 30 for mixing water, a mixing adjustor 50, a hot water supply pipe 60 and a water heating temperature sensor 61. A controller 70 is provided to give a command to set and alter the set hot water storage temperature to a fixed temperature of 50-60 deg.C as safety operation while fully opening the path on the side of the bypass pipe 30 as to the mixing adjustor 50 if the water heating temperature sensor 61 detects the temperature higher by a fixed value than a set water heating temperature at the time when the hot water storage temperature of the hot water storage tank 14 is set at a fixed temperature of 70 deg.C or higher.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water storage type hot water supply apparatus, for example, a semi hot water storage type hot water supply apparatus, in which hot hot water stored in a hot water can is mixed with water to a predetermined set hot water temperature. The present invention relates to a hot water storage type hot water supply device capable of performing a bath heating operation and a heating operation through a heat exchanging coil for bath heating and a heat exchange coil for heating in a hot water storage can.

[0002]

2. Description of the Related Art A hot water supply device conventionally provided with a hot water storage can body having a relatively small amount of hot water storage, which is called a semi-hot water storage type, and which also has a heating operation function and a bath reheating operation function at the same time. Since it is necessary to heat the heating water and the bath circulating water to a sufficiently high temperature by the heat exchange coil for heating and the heat exchange coil for reheating the bath disposed inside the body, the hot water storage can body of the semi-hot water storage is relatively small. The hot water stored in the hot water is kept at a considerably high temperature, for example, 80 ° C, and when hot water is supplied, this hot water is mixed with water by a mixing controller to adjust the hot water to the set hot water temperature. .

[0003]

However, in the above-mentioned conventional hot water storage type hot water supply apparatus, for example, a mixing controller for mixing and adjusting high temperature water with water cannot operate normally due to improper installation or the like. 50 ° C for the set hot water temperature
There is a problem of control abnormality that the actual hot water supply temperature becomes considerably higher than the set hot water supply temperature, such as when hot water is supplied at a temperature exceeding ℃. Therefore, there is a problem that a hot water user may get burned by unexpectedly high temperature hot water. On the other hand, when the hot water supply temperature becomes significantly higher than the set hot water supply temperature, the control becomes abnormal,
If the burning operation of the burner is stopped to ensure safety, there is a problem that it is not possible to perform an unrelated bath reheating operation or heating operation.

Therefore, the present invention solves the above-mentioned drawbacks of the conventional apparatus, and when an abnormal control occurs such that the actual hot water supply is performed at a temperature considerably higher than the set hot water supply temperature due to improper installation of the mixing controller or the like. Accordingly, it is an object of the present invention to provide a hot water storage type hot water supply device capable of preventing a hot water supply user from suffering a burn or the like and capable of continuously performing a heating operation and a bath reheating operation.

[0005]

In order to achieve the above object, a hot water storage type hot water supply apparatus of the present invention comprises a heating burner and a hot water storage tank heated by the burner, and is used for heating or bath reheating. Hot water storage can body having a heat exchange coil arranged in the hot water storage tank, a water inlet pipe to the hot water storage can body, a hot water outlet pipe from the hot water storage can body, and a hot water outlet pipe branched from the middle of the water inlet pipe. A bypass pipe for mixed water directly connected to the bypass pipe, and at the confluence of the bypass pipe and the hot water outlet pipe, by adjusting the mixing ratio of the water amount from the bypass pipe side and the hot water amount from the hot water outlet pipe side. What is claimed is: 1. A hot water storage type hot water supply apparatus comprising: a hot water supply device having a set hot water supply temperature; a hot water supply pipe provided downstream of the hot water supply pipe; and a hot water supply temperature sensor provided at the hot water supply pipe. Before when the hot water storage temperature in the bath is set to a constant temperature of 70 ℃ or higher When the hot water supply temperature sensor detects a temperature higher than the set hot water temperature by a certain temperature or more, as a safe operation, the set hot water storage temperature in the hot water storage tank is changed from the constant temperature of 70 ° C or higher to the constant temperature of 50 ° C or higher to 60 ° C or lower. And a controller for instructing the mixing controller to fully open the bypass pipe side passage.

[0006]

According to the above feature of the present invention, when the actual hot water supply temperature detected by the hot water supply temperature sensor during the hot water supply operation becomes higher than the set hot water supply temperature by a certain temperature or more, the controller holds the hot water in the hot water storage tank. If the temperature is controlled at a constant temperature of 70 ° C or higher, the set hot water temperature is 60
The setting will be changed to a constant temperature below 50 ℃ and above 50 ℃. Further, the controller commands the mixing regulator to open the bypass pipe side passage. Therefore, for the hot water supply after that, the temperature of the hot water discharged from the hot water storage tank itself is kept at a constant temperature of 60 ° C or less and 50 ° C or more, and the mixing controller is instructed to fully open the bypass pipe side passage. A sufficient amount of water from the side, at least some water, will flow in, resulting in elimination of hot water supply that would cause burns. On the other hand, for the bath reheating operation and the heating operation, the operation of the burner is not stopped, and the hot water storage temperature is maintained at a constant temperature of 60 ° C or lower and 50 ° C or higher, even though the temperature is slightly low, The operation can be continued.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments.
1 is an overall configuration diagram of a hot water storage type hot water supply apparatus showing an embodiment of the present invention, and FIG. 2 is a control flowchart by a controller.

In FIG. 1, an inlet pipe for the hot water storage canister 10
A hot water outlet pipe 40 is connected to the hot water outlet pipe 40, and a bypass pipe 30 branched from the water inlet pipe 20 near the hot water storage can 10 is connected to the hot water outlet pipe 40. A mixing controller 50 is provided at the confluence of the bypass pipe 30 with the tap pipe 40. A hot water supply pipe 60 is provided downstream of the mixing controller 50. The hot-water storage can body 10 is a semi-hot-water storage type hot-water storage can body, and a combustion chamber 11 is provided in the lower part of the can body 10 for combustion by a petroleum burner 12. The oil burner 12 may be a gas burner. A hot water storage tank 14 is provided outside the exhaust pipe 13 standing upright from the combustion chamber 11, and hot water is stored therein. In the hot water storage tank 14, a heat exchange coil 15 for heating is provided near the exhaust pipe 13, and a heat exchange coil 16 for bath heating is provided far away. In addition, hot water storage can body 10
A hot water storage temperature sensor 17 for detecting the hot water storage temperature therein is provided.

The water inlet pipe 20 is provided with a water temperature sensor 21 and a water flow sensor 22. Also the mixing controller
A hot water supply temperature sensor 61 and a hot water supply flow rate sensor 62 are provided in a hot water supply pipe 60 downstream of 50. The hot water sent into the hot water supply pipe 60 through the mixing controller 50 is supplied from the hot water supply currant 63 at the end, and is also supplied to the bathtub through the bath hot water supply pipe 64 branched in the middle. 70 is a controller for controlling the operation of the device, which has a built-in microcomputer, inputs information from sensors of each part of the device and commands from a remote controller, and performs a predetermined control operation according to a predetermined program to the oil burner 12 or the mixing controller 50, Output to others.

An example of the hot water supply operation control by the controller 70 will be described with reference to FIG. 2 as well. When the hot water supply cullan 63 and the like are opened and the hot water supply is started, the controller 70 causes the water input temperature sensor 21 to enter the water. From the temperature, the hot water storage temperature from the hot water storage temperature sensor 17, and the set hot water supply temperature set by the user or the like, the hot water of the set hot water supply temperature is supplied to the hot water supply pipe 60 from the bypass pipe 30 by the mixing controller 50. The mixing ratio between the water and the hot water from the tap pipe 40 is calculated, and the mixing controller 50 is adjusted and controlled so that the mixing ratio is achieved (S1). During the hot water supply operation, recalculation is performed at regular time intervals and each time the set hot water supply temperature is changed to ensure an appropriate mixing ratio. In the above, the hot water storage temperature of the hot water storage tank 14 is set to a constant temperature of 70 ° C. or higher in normal times, for example, 80 ° C. However, when only the hot water supply operation is performed, the controller 70 sets the temperature of the hot water storage tank 14. The temperature may be adjusted to a temperature slightly higher than the set hot water supply temperature. Of course, when heating operation or bath reheating operation is performed, the controller 70
Is the set hot water temperature of the hot water storage tank, a constant temperature of 70 ° C or higher,
For example, 80 ° C. is set, and the combustion of the oil burner 12 is controlled so as to reach the set hot water storage temperature.

During the hot water supply operation, the preset hot water storage temperature of the hot water storage tank 14 is a constant temperature of 70 ° C. or higher, in the embodiment, 80 ° C.,
If (YES in S2), the hot water supply temperature sensor 61 detects a temperature higher than the set hot water supply temperature by a certain level or more, for example, 10 ° C. or more (YES in S3), and inputs the temperature information. As a safe operation, the controller 70 that has set the hot water storage temperature of the hot water storage tank 14 at 50 ° C or below 60 ° C.
The setting is changed to the above constant temperature, for example, 60 ° C., and the mixing controller 50 is instructed to fully open the bypass pipe 30 side passage (S4). In addition, the controller 70 displays the device failure on a display unit such as the controller 70 or a remote controller (S
3). By lowering the preset hot water storage temperature from 60 ° C or lower to a constant temperature of 50 ° C or higher, the hot water discharge temperature itself from the hot water storage tank 14 is reduced, and even if the mixing adjustment of the mixing controller 50 is poor, high-temperature hot water can be supplied. You can reduce what is done. Moreover, since the controller 70 commands the mixing controller 50 to open the air path on the bypass pipe 30 side fully, even if there is a control abnormality in the mixing controller 50, an increase in the amount of water from the bypass pipe 30 side can be expected to some extent. Even by this, hot water supply at a temperature that considerably exceeds the set hot water supply temperature can be prevented more reliably.

[0012]

According to the present invention, there is provided the above construction.
According to the hot water storage type hot water supply device described in (1), the hot water storage temperature of the hot water storage tank is
If the hot water supply temperature sensor detects a temperature higher than the set hot water temperature by a certain temperature or higher when the temperature is set to a constant temperature of 70 ℃ or higher, the set hot water temperature in the hot water storage tank is set to 70 ℃ or higher as a safe operation. Since the controller was installed to change the setting from a constant temperature to a constant temperature of 60 ° C or less and 50 ° C or more, and to instruct the mixing controller to open the bypass pipe side passage fully, the temperature of the hot water discharged from the hot water storage tank itself Can be kept at a constant temperature below 60 ° C and above 50 ° C, and more water can be expected to pass through the mixing controller that is instructed to fully open the bypass pipe side passage, so the hot water supply temperature can be more reliably ensured. The hot water supply which can be reduced and the user of the hot water supply may get burned or the like is eliminated. On the other hand, for the bath reheating operation and heating operation, the burner operation is not interrupted, and the hot water storage temperature is maintained at a constant temperature of 60 ° C or less and 50 ° C or more, even though it is a slightly low temperature. You can drive.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a hot water storage type hot water supply apparatus showing an embodiment of the present invention.

FIG. 2 is a control flowchart of a controller.

[Explanation of symbols]

 10 Hot water storage tank 12 Oil burner 14 Hot water storage tank 15 Heat exchange coil for heating 16 Heat exchange coil for bath reheating 20 Water inlet pipe 30 Bypass pipe 40 Hot water outlet pipe 50 Mixing controller 60 Hot water pipe 61 Hot water temperature sensor 70 Controller

Claims (1)

[Claims] 1. A hot water storage can body comprising a burner for heating and a hot water storage tank for hot water heated by the burner, and a heat exchange coil for arranging heating and bath reheating in the hot water storage tank, A water inlet pipe to the hot water storage can body, a hot water outlet pipe from the hot water storage can body, a bypass pipe for mixing water branched from the middle of the water inlet pipe and directly connected to the hot water storage pipe, the bypass pipe and the hot water outlet pipe At the confluence point of, the mixing controller for adjusting the mixing ratio of the water amount from the bypass pipe side and the hot water amount from the hot water outlet pipe side to obtain the hot water of the set hot water supply temperature, and the mixing controller arranged downstream from the mixing regulator. A hot water storage type hot water supply apparatus comprising a hot water supply pipe provided and a hot water temperature sensor provided in the hot water supply pipe, wherein the hot water supply is performed when the hot water storage temperature of the hot water storage tank is set to a constant temperature of 70 ° C or higher. The temperature sensor detected a temperature higher than the set hot water supply temperature by a certain temperature. Expediently, 60 ° C. The setting hot water storage temperature in the hot water storage tank from a constant temperature above the 70 ° C. as a safe operation
A hot water storage type hot water supply apparatus comprising: a controller for setting a constant temperature of 50 ° C. or higher and for instructing the mixing controller to open the bypass pipe side passage.